The Aspire Nautilus X U-Tech Replacement Coils features the latest atomizer technology for the highly appraised Aspire. Engineered to add versatility to the Aspire Nautilus X Tank, it an innovative replacement coils optimized for mouth-to-lung enthusiasts while enabling robust flavor recreation. The structure design of the coil features a top-airflow intake that travels down through the vertical spacing of the coil, then passes up through the other airslot for a U-formation. It is constructed with superior stainless steel encasing the core of Kanthal heating elements and organic cotton.